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Information × Registration Number 0224U032924, (0124U002581) , R & D reports Title Environmentally safe piezo/ferroelectric flexible nanocomposites for converting mechanical load into light and electrical energy popup.stage_title Створення гнучких бінарних та гібридних композитів. Head Maksym M. Lazarenko, Доктор фізико-математичних наук Registration Date 11-12-2024 Organization Taras Shevchenko National University of Kyiv popup.description1 Development of piezoelectric flexible environmentally friendly ("green") hybrid composites that respond to external mechanical loads with two different types of signals: piezoelectric (PzE) and mechanoluminescent (ML) popup.description2 Object of study: piezo/ferroelectric flexible nanocomposites. Aim of work: Elaboration of piezoelectric flexible environmentally safe ("green") hybrid composites that respond to external mechanical loads with two different types of signals: piezoelectric (PzE) and mechanoluminescent (ML). Research methods: structural, optical, electrical, mechanical and thermophysical research. Characteristics of the produced series of binary composites with different component content ratios (cellulose - oxide; cellulose - carbon nanotubes), hybrid composites (cellulose - oxide - CNTs), and a series of paper-like (based on cellulose and nanocellulose) flexible binary and hybrid composites were determined. Dependence of the photoluminescence, dielectric characteristics and tensile strength on content of the components was determined. The positive effect of increasing the content of: oxide - up to 23 wt. % - on the intensity of photoluminescence, nanocellulose - up to 5 wt. %, and CNTs - up to 3 vol. % - on the strength of such composites was found. The strength of the composites, however, decreases at oxide concentrations above 23 wt. %, and PL intensity decreases with addition of CNTs. The composition of the composite (0.5 wt. % NC, 0.5 wt. % CNT, 20 wt. % oxide) was determined to be optimal. The dielectric (dielectric constant) and piezoelectric characteristics (piezoelectric modulus d 11 and electromechanical coupling coefficient k 11 ) of the produced oxide components, 3 series of composites and 2 types of standards (powder of tetragonal BaTiO 3 and polyvinylidene fluoride PVDF polymer film) were determined experimentally. It was found that the compositions optimal for PzE response are: 1) in a series of different luminescent oxide components: Bi3.96Pr0.04Ti3O12; PbZr0.4Ti0.6O3:1 ат% Pr and Bi2.985Pr0.015TiNbO9; 2) in a series of paper-like composites: Paper cellulose + 0.5 wt.% NC + 30 wt.% SAOED + 0.3 wt. % CNT; Product Description popup.authors Yeshchenko Dmytro А. Alieksieiev Serhii O. Andrusenko Dmytro A. Barbash Valerii A. Borysiuk Viktor I. Kateryna I. Hnatiuk Valeria O. Zozulia Nedilko Serhii H. Sosnovska Mariia О. Nataliia Y. Strutynska Kateryna V. Terebilenko Hizhnyi Yurii A. Chornii Vitalii Р. Yashchenko Olha V. popup.nrat_date 2024-12-11 Close